Fight Spam on Multiple Fronts

"After getting hit hard by the Nimda worm in 2001, the Virginia Hospital Centre in Arlington is protected by five layers of antivirus and antispam defences: an email relay and antivirus product called eSafe from Aladdin Knowledge Systems; an antispam and antivirus device from MailFrontier; Symantec antivirus software on the email servers and desktops; and a Web filter from Websense to monitor HTTP traffic and prevent employees from accidentally downloading viruses from the Web." Source: techworld.com